Dear all
I really need you all guys help. I have data set like below;
Contract | Contract_Date | Contract_Amount |
1 | 01-Jan-13 | 10000 |
2 | 02-Jan-13 | 20000 |
3 | 01-Feb-14 | 30000 |
4 | 02-Feb-14 | 25000 |
5 | 10-Jun-14 | 22000 |
6 | 11-Jun-14 | 22000 |
and I want to create a new column name "AVG_Contract_AMT". I want to add the average of Contract_Amount which Contract_Date <= each row Contract_date like this
Contract | Contract_Date | Contract_Amount | AVG_Contract_AMT |
1 | 01-Jan-13 | 10000 | 10000 |
2 | 02-Jan-13 | 20000 | 15000 |
3 | 01-Feb-14 | 30000 | 20000 |
4 | 02-Feb-14 | 25000 | 21250 |
5 | 10-Jun-14 | 22000 | 21400 |
6 | 11-Jun-14 | 22000 | 21500 |
I have never do any coding in EG like this before. Is there any examples?
And In case I want to find Z Value ((X-AVG/SD)) for each contract,but AVG of data and SD must have contract_Date <= each row contract date like below
Contract | Contract_Date | Contract_Amount | AVG_Contract_AMT | SD | Z |
1 | 01-Jan-13 | 10000 | 10000 | 100 | 0 |
2 | 02-Jan-13 | 20000 | 15000 | 100 | 50 |
3 | 01-Feb-14 | 30000 | 20000 | 100 | 100 |
4 | 02-Feb-14 | 25000 | 21250 | 79.05694 | 47.43 |
5 | 10-Jun-14 | 22000 | 21400 | 66.3325 | 9.045 |
6 | 11-Jun-14 | 22000 | 21500 | 60.55301 | 8.257 |
Please suggest the solution for me. Thank you in advance.
Best Regards,
Ros
proc sort data=have;
by contract_date;
run;
data want (drop=sum_amount);
set have;
retain sum_amount 0;
sum_amount + contract_amount;
avg_contract_amt = sum_amount / _N_;
run;
From there you can then do the other calculations
What is C ? and SD means STD ?
data have; input Contract Contract_Date : date11. Contract_Amount ; format Contract_Date date9.; cards; 1 01-Jan-13 10000 2 02-Jan-13 20000 3 01-Feb-14 30000 4 02-Feb-14 25000 5 10-Jun-14 22000 6 11-Jun-14 22000 ; run; proc sql; create table want as select *,(select avg(Contract_Amount) from have where Contract_Date le a.Contract_Date) as AVG_Contract_AMT, (select std(Contract_Amount) from have where Contract_Date le a.Contract_Date) as SD from have as a ; quit;
Xia Keshan
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